Sash lock



June 10 I924; T391195 c. G. PALMER sAsH LocK Filed May 25. 1.92s

A TTORNE Y Patented June 1%, 1324.

n M1 E ta r PATEW? CHARLES G. PALMER, OF NEWARK, NEW JERSEY.

.SASH LOCK.

Application filed May 25, 1923.

of New Jersey, have invented certain new and useful Improvements in Sash Locks, of which the following is a specification.

This invention relates to devices for holding a window sash or thelike in a raised adjusted position and has as one of its objects to provide a sash lock of exceedingly simple construction, tending to economy in manufacture and in space occupied.

A further purpose is to produce a locking device which requires a minimum of exertion to operate.

These and other like aims are accomplished by the novel construction, combination and arrangement of'parts hereafter de scribed and shown in the accompanying drawing, forming a material part of this disclosure, and in Which:-

Figure 1 is a front elevational view of the lock and its keeper rack as applied to a conventional type of window.

Figure 2 is an edge view looking from the operating side of the lock.

Figure 3 is a rear side view showing the lock construction.

Figure 4 is an edge view looking from the engaging side.

Describing the drawing more in detail, a window sash is designated by the numeral 10, containing a glazedpanel 11 and mount ed to slide perpendicularly in a frame 12 above the sill 13, the sash being shown as partially raised.

Fixed to the frame 12, on one or both sides, is a metal rack bar.14 having on its face a plurality of spaced outstanding projections 15 having curved profiles 16 and 17 the latter of which is of a definite radius as will hereafter appear, while the curve 16 may be any which will gracefully connect between.

At the extreme upper end of the bar is an outstanding'lug 18 adapted to act as a stop or limit in raising the sash.

It is to be understood that it is by no means necessary to use an elongated bar, as one or more independent units having a single projection 15 and curve 17 may be employed if desired in place of the bar.

The lock includes a unitary casing composed of a face plate 20, its end walls 21 Serial 1W0. 641,284.

and 22 being curved to present opposed arcs and terminate in flanged bases 23' and 24, the latter being'preferably of lesser width as shown.

These bases are drilled and countersunk, as at 25, to receive screws 26 for holding them rigidly to the sash.

Joined to the face 20, between the ends of the walls 21 and 22 are side walls 27 and 28, the former being cut away, as at 29 and the latter wall 28 opened as at 30, there being a chamber 31 bounded by these several walls, and projecting laterally outward from the wall 28, at the end oflthe opening 30 adjacent the base 24, is a rigid grip handle or thumb piece 32, the outer portion of which may be wider than the thickness of the eas- Extending integrally from the face plate 20, within the chamber and adjacent the flange base 24, is a post 33 having a finished surface to enter and act as a pivot for the bored hub 34 of an operating lever 35, the post being upset on its'end to maintain the hub in place when assembled.

The extending end of the lever 35 is suited to be grasped simultaneously with the thumb grip 32, by the fingers and raised to contact with its lower side, although the lever is held normally depressed against the wall 28 by a coiled expansion spring 36, disposed between the wall 22 and seat on the lever, said seat being provided with a pin 37 encircled by the spring, preventing its displacement.

Another arm 38 extends from the hub 34 and terminates in an outturned hook like detent 39, the outer edge of which is finished on the arc of a circle having the post 33 as its axis, this radius beingthe same as: the stepsor seats 17 of the rack or catches, and it is to be noted that the radius of the wall 21 is only slightly in excess so as to permit retraction of the detent 39 when it is desired to adjust the sash.

In operation the lever 35 is pressed towards the thumb piece 32, sufficiently to withdraw the detent 39, the same sliding smoothly on the teeth 17 with no tendency to raise the sash whatever, and immediately the lever is released the spring 36 operates to press the detent outwardly into engaging position.

Due to the construction and-proportion of parts the chamber 31 can be relatively small, and it will be clear that the detent cannot be without conflicting with the scope of the appended claims.

Having thus described my invention, what I claim as new and desire to secure by Letters Patent, is

1. The combination with a window frame and sash slidable therein, of one or more stops fixed on said frame adjacent the sash, said stops having arcuately profiled seats, a casing fixed on said sash and a spring impelled lever operative therein, said lever having a recedent arcuately curved detent portion engageable on said seats.

2. The combination with a window frame and sash slidable therein, of one or more stops fixed on said frame adjacent the sash, said stops having arcuately profiled seats, a casing fixed on said sash and a spring impelled lever operative therein, a post integral with said casing on which said lever "fulcrums, said post being upset to maintain the lever and a detent element formed on said lever having its contact surface concentric with said post, said post also representing the axis of the stop seats.

3. A window lock comprising a casing fixed upon the window sash, a detent pivoted to move in and out of a chamber formed in said casing, a lever integral with said detent provided with a seat, an integral pin extending from said seat, a coiled spring encircling" said pin and interposed between said seat and the upper wall of said casing, a single post integral with said casing extending through said detent and upset to retain the same in place, the detent having its contact surface concentric with said post.

4. A window lock comprising a casing fixed upon the window sash, a detent pivoted to move in and out of a chamber formed in said casing, a spring pressed lever integral with said detent, a single post in said casing extending through said detent and upset to retain the same in place and a bar having a plurality of irregular concave recesse s the lower seat portions of which are arcs of a circle having the detent axis as their centers, said bar being fixed on the frame of the window adjacent the sash.

5. A window lock comprising a casing fixed upon the window sash, a detent pivoted to move in and out of a chamber formed in said casing. a lever integral with said detent, a coiled spring interposed between said lever and the upper wall of said casing and a bar having a plurality of recesses suited to receive said detent, and a stop at the end of said bar limiting the upward movement f the sash.

This specification, signed and witnessed this fifth day of May, 1928.

CHARLES G. PALMER. Vitnesses FREDK C. FISCHER, FERDINAND NOLL. 

